/*      $NetBSD: term.c,v 1.32 2001/01/23 15:55:31 jdolecek Exp $       */

/*-
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Christos Zoulas of Cornell University.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "compat.h"
#if !defined(lint) && !defined(SCCSID)
#if 0
static char sccsid[] = "@(#)term.c      8.2 (Berkeley) 4/30/95";
#else
__RCSID("$NetBSD: term.c,v 1.32 2001/01/23 15:55:31 jdolecek Exp $");
#endif
#endif /* not lint && not SCCSID */

/*
 * term.c: Editor/termcap-curses interface
 *         We have to declare a static variable here, since the
 *         termcap putchar routine does not take an argument!
 */
#include "sys.h"
#include <stdio.h>
#include <signal.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/ioctl.h>

#include "el.h"
/*
 * IMPORTANT NOTE: these routines are allowed to look at the current screen
 * and the current possition assuming that it is correct.  If this is not
 * true, then the update will be WRONG!  This is (should be) a valid
 * assumption...
 */

extern int tgetent();
extern int tgetnum();
extern char *tgetstr();
extern void tputs();
extern char PC;
extern short ospeed;
extern char *tgoto(const char *cap, int col, int row);
extern int tgetflag(char *id);

#define TC_BUFSIZE      2048

#define GoodStr(a)      (el->el_term.t_str[a] != NULL && \
                            el->el_term.t_str[a][0] != '\0')
#define Str(a)          el->el_term.t_str[a]
#define Val(a)          el->el_term.t_val[a]

#ifdef notdef
private const struct {
        const char *b_name;
        int b_rate;
} baud_rate[] = {
#ifdef B0
        { "0", B0 },
#endif
#ifdef B50
        { "50", B50 },
#endif
#ifdef B75
        { "75", B75 },
#endif
#ifdef B110
        { "110", B110 },
#endif
#ifdef B134
        { "134", B134 },
#endif
#ifdef B150
        { "150", B150 },
#endif
#ifdef B200
        { "200", B200 },
#endif
#ifdef B300
        { "300", B300 },
#endif
#ifdef B600
        { "600", B600 },
#endif
#ifdef B900
        { "900", B900 },
#endif
#ifdef B1200
        { "1200", B1200 },
#endif
#ifdef B1800
        { "1800", B1800 },
#endif
#ifdef B2400
        { "2400", B2400 },
#endif
#ifdef B3600
        { "3600", B3600 },
#endif
#ifdef B4800
        { "4800", B4800 },
#endif
#ifdef B7200
        { "7200", B7200 },
#endif
#ifdef B9600
        { "9600", B9600 },
#endif
#ifdef EXTA
        { "19200", EXTA },
#endif
#ifdef B19200
        { "19200", B19200 },
#endif
#ifdef EXTB
        { "38400", EXTB },
#endif
#ifdef B38400
        { "38400", B38400 },
#endif
        { NULL, 0 }
};
#endif

private const struct termcapstr {
        const char *name;
        const char *long_name;
} tstr[] = {
#define T_al    0
        { "al", "add new blank line" },
#define T_bl    1
        { "bl", "audible bell" },
#define T_cd    2
        { "cd", "clear to bottom" },
#define T_ce    3
        { "ce", "clear to end of line" },
#define T_ch    4
        { "ch", "cursor to horiz pos" },
#define T_cl    5
        { "cl", "clear screen" },
#define T_dc    6
        { "dc", "delete a character" },
#define T_dl    7
        { "dl", "delete a line" },
#define T_dm    8
        { "dm", "start delete mode" },
#define T_ed    9
        { "ed", "end delete mode" },
#define T_ei    10
        { "ei", "end insert mode" },
#define T_fs    11
        { "fs", "cursor from status line" },
#define T_ho    12
        { "ho", "home cursor" },
#define T_ic    13
        { "ic", "insert character" },
#define T_im    14
        { "im", "start insert mode" },
#define T_ip    15
        { "ip", "insert padding" },
#define T_kd    16
        { "kd", "sends cursor down" },
#define T_kl    17
        { "kl", "sends cursor left" },
#define T_kr    18
        { "kr", "sends cursor right" },
#define T_ku    19
        { "ku", "sends cursor up" },
#define T_md    20
        { "md", "begin bold" },
#define T_me    21
        { "me", "end attributes" },
#define T_nd    22
        { "nd", "non destructive space" },
#define T_se    23
        { "se", "end standout" },
#define T_so    24
        { "so", "begin standout" },
#define T_ts    25
        { "ts", "cursor to status line" },
#define T_up    26
        { "up", "cursor up one" },
#define T_us    27
        { "us", "begin underline" },
#define T_ue    28
        { "ue", "end underline" },
#define T_vb    29
        { "vb", "visible bell" },
#define T_DC    30
        { "DC", "delete multiple chars" },
#define T_DO    31
        { "DO", "cursor down multiple" },
#define T_IC    32
        { "IC", "insert multiple chars" },
#define T_LE    33
        { "LE", "cursor left multiple" },
#define T_RI    34
        { "RI", "cursor right multiple" },
#define T_UP    35
        { "UP", "cursor up multiple" },
#define T_kh    36
        { "kh", "send cursor home" },
#define T_at7   37
        { "@7", "send cursor end" },
#define T_str   38
        { NULL, NULL }
};

private const struct termcapval {
        const char *name;
        const char *long_name;
} tval[] = {
#define T_am    0
        { "am", "has automatic margins" },
#define T_pt    1
        { "pt", "has physical tabs" },
#define T_li    2
        { "li", "Number of lines" },
#define T_co    3
        { "co", "Number of columns" },
#define T_km    4
        { "km", "Has meta key" },
#define T_xt    5
        { "xt", "Tab chars destructive" },
#define T_xn    6
        { "xn", "newline ignored at right margin" },
#define T_MT    7
        { "MT", "Has meta key" },                       /* XXX? */
#define T_val   8
        { NULL, NULL, }
};
/* do two or more of the attributes use me */

private void    term_setflags(EditLine *);
private int     term_rebuffer_display(EditLine *);
private void    term_free_display(EditLine *);
private int     term_alloc_display(EditLine *);
private void    term_alloc(EditLine *, const struct termcapstr *, char *);
private void    term_init_arrow(EditLine *);
private void    term_reset_arrow(EditLine *);


private FILE *term_outfile = NULL;      /* XXX: How do we fix that? */


/* term_setflags():
 *      Set the terminal capability flags
 */
private void
term_setflags(EditLine *el)
{
        EL_FLAGS = 0;
        if (el->el_tty.t_tabs)
                EL_FLAGS |= (Val(T_pt) && !Val(T_xt)) ? TERM_CAN_TAB : 0;

        EL_FLAGS |= (Val(T_km) || Val(T_MT)) ? TERM_HAS_META : 0;
        EL_FLAGS |= GoodStr(T_ce) ? TERM_CAN_CEOL : 0;
        EL_FLAGS |= (GoodStr(T_dc) || GoodStr(T_DC)) ? TERM_CAN_DELETE : 0;
        EL_FLAGS |= (GoodStr(T_im) || GoodStr(T_ic) || GoodStr(T_IC)) ?
            TERM_CAN_INSERT : 0;
        EL_FLAGS |= (GoodStr(T_up) || GoodStr(T_UP)) ? TERM_CAN_UP : 0;
        EL_FLAGS |= Val(T_am) ? TERM_HAS_AUTO_MARGINS : 0;
        EL_FLAGS |= Val(T_xn) ? TERM_HAS_MAGIC_MARGINS : 0;

        if (GoodStr(T_me) && GoodStr(T_ue))
                EL_FLAGS |= (strcmp(Str(T_me), Str(T_ue)) == 0) ?
                    TERM_CAN_ME : 0;
        else
                EL_FLAGS &= ~TERM_CAN_ME;
        if (GoodStr(T_me) && GoodStr(T_se))
                EL_FLAGS |= (strcmp(Str(T_me), Str(T_se)) == 0) ?
                    TERM_CAN_ME : 0;


#ifdef DEBUG_SCREEN
        if (!EL_CAN_UP) {
                (void) fprintf(el->el_errfile,
                    "WARNING: Your terminal cannot move up.\n");
                (void) fprintf(el->el_errfile,
                    "Editing may be odd for long lines.\n");
        }
        if (!EL_CAN_CEOL)
                (void) fprintf(el->el_errfile, "no clear EOL capability.\n");
        if (!EL_CAN_DELETE)
                (void) fprintf(el->el_errfile, "no delete char capability.\n");
        if (!EL_CAN_INSERT)
                (void) fprintf(el->el_errfile, "no insert char capability.\n");
#endif /* DEBUG_SCREEN */
}


/* term_init():
 *      Initialize the terminal stuff
 */
protected int
term_init(EditLine *el)
{

        el->el_term.t_buf = (char *) el_malloc(TC_BUFSIZE);
        if (el->el_term.t_buf == NULL)
                return (-1);
        el->el_term.t_cap = (char *) el_malloc(TC_BUFSIZE);
        if (el->el_term.t_cap == NULL)
                return (-1);
        el->el_term.t_fkey = (fkey_t *) el_malloc(A_K_NKEYS * sizeof(fkey_t));
        if (el->el_term.t_fkey == NULL)
                return (-1);
        el->el_term.t_loc = 0;
        el->el_term.t_str = (char **) el_malloc(T_str * sizeof(char *));
        if (el->el_term.t_str == NULL)
                return (-1);
        (void) memset(el->el_term.t_str, 0, T_str * sizeof(char *));
        el->el_term.t_val = (int *) el_malloc(T_val * sizeof(int));
        if (el->el_term.t_val == NULL)
                return (-1);
        (void) memset(el->el_term.t_val, 0, T_val * sizeof(int));
        term_outfile = el->el_outfile;
        if (term_set(el, NULL) == -1)
                return (-1);
        term_init_arrow(el);
        return (0);
}
/* term_end():
 *      Clean up the terminal stuff
 */
protected void
term_end(EditLine *el)
{

        el_free((ptr_t) el->el_term.t_buf);
        el->el_term.t_buf = NULL;
        el_free((ptr_t) el->el_term.t_cap);
        el->el_term.t_cap = NULL;
        el->el_term.t_loc = 0;
        el_free((ptr_t) el->el_term.t_str);
        el->el_term.t_str = NULL;
        el_free((ptr_t) el->el_term.t_val);
        el->el_term.t_val = NULL;
        term_free_display(el);
}


/* term_alloc():
 *      Maintain a string pool for termcap strings
 */
private void
term_alloc(EditLine *el, const struct termcapstr *t, char *cap)
{
        char termbuf[TC_BUFSIZE];
        int tlen, clen;
        char **tlist = el->el_term.t_str;
        char **tmp, **str = &tlist[t - tstr];

        if (cap == NULL || *cap == '\0') {
                *str = NULL;
                return;
        } else
                clen = strlen(cap);

        tlen = *str == NULL ? 0 : strlen(*str);

        /*
         * New string is shorter; no need to allocate space
         */
        if (clen <= tlen) {
                (void) strcpy(*str, cap);       /* XXX strcpy is safe */
                return;
        }
        /*
         * New string is longer; see if we have enough space to append
         */
        if (el->el_term.t_loc + 3 < TC_BUFSIZE) {
                                                /* XXX strcpy is safe */
                (void) strcpy(*str = &el->el_term.t_buf[el->el_term.t_loc],
                    cap);
                el->el_term.t_loc += clen + 1;  /* one for \0 */
                return;
        }
        /*
         * Compact our buffer; no need to check compaction, cause we know it
         * fits...
         */
        tlen = 0;
        for (tmp = tlist; tmp < &tlist[T_str]; tmp++)
                if (*tmp != NULL && *tmp != '\0' && *tmp != *str) {
                        char *ptr;

                        for (ptr = *tmp; *ptr != '\0'; termbuf[tlen++] = *ptr++)
                                continue;
                        termbuf[tlen++] = '\0';
                }
        memcpy(el->el_term.t_buf, termbuf, TC_BUFSIZE);
        el->el_term.t_loc = tlen;
        if (el->el_term.t_loc + 3 >= TC_BUFSIZE) {
                (void) fprintf(el->el_errfile,
                    "Out of termcap string space.\n");
                return;
        }
                                        /* XXX strcpy is safe */
        (void) strcpy(*str = &el->el_term.t_buf[el->el_term.t_loc], cap);
        el->el_term.t_loc += clen + 1;  /* one for \0 */
        return;
}


/* term_rebuffer_display():
 *      Rebuffer the display after the screen changed size
 */
private int
term_rebuffer_display(EditLine *el)
{
        coord_t *c = &el->el_term.t_size;

        term_free_display(el);

        c->h = Val(T_co);
        c->v = Val(T_li);

        if (term_alloc_display(el) == -1)
                return (-1);
        return (0);
}


/* term_alloc_display():
 *      Allocate a new display.
 */
private int
term_alloc_display(EditLine *el)
{
        int i, j;
        char **b;
        coord_t *c = &el->el_term.t_size;

        b = (char **) el_malloc((size_t) (sizeof(char *) * (c->v + 1)));
        if (b == NULL)
                return (-1);
        for (i = 0; i < c->v; i++) {
                b[i] = (char *) el_malloc((size_t) (sizeof(char) * (c->h + 1)));
                if (b[i] == NULL) {
                        /* Free up all memory allocated so far. */
                        for (j = 0; j < i; j++)
                                el_free (b[j]);
                        el_free (b);

                        return (-1);
                }
        }
        b[c->v] = NULL;
        el->el_display = b;

        b = (char **) el_malloc((size_t) (sizeof(char *) * (c->v + 1)));
        if (b == NULL)
                return (-1);
        for (i = 0; i < c->v; i++) {
                b[i] = (char *) el_malloc((size_t) (sizeof(char) * (c->h + 1)));
                if (b[i] == NULL) {
                        /* Free up all memory allocated so far. */
                        for (j = 0; j < i; j++)
                                el_free (b[j]);
                        el_free (b);

                        /* Free up all memory allocated so far in el->el_display. */
                        b = el->el_display;
                        el->el_display = NULL;
                        for (i = 0; i < c->v; i++)
                                el_free (b[i]);
                        el_free (b);

                        return (-1);
                }
        }
        b[c->v] = NULL;
        el->el_vdisplay = b;
        return (0);
}


/* term_free_display():
 *      Free the display buffers
 */
private void
term_free_display(EditLine *el)
{
        char **b;
        char **bufp;

        b = el->el_display;
        el->el_display = NULL;
        if (b != NULL) {
                for (bufp = b; *bufp != NULL; bufp++)
                        el_free((ptr_t) * bufp);
                el_free((ptr_t) b);
        }
        b = el->el_vdisplay;
        el->el_vdisplay = NULL;
        if (b != NULL) {
                for (bufp = b; *bufp != NULL; bufp++)
                        el_free((ptr_t) * bufp);
                el_free((ptr_t) b);
        }
}


/* term_move_to_line():
 *      move to line <where> (first line == 0)
 *      as efficiently as possible
 */
protected void
term_move_to_line(EditLine *el, int where)
{
        int del;

        if (where == el->el_cursor.v)
                return;

        if (where > el->el_term.t_size.v) {
#ifdef DEBUG_SCREEN
                (void) fprintf(el->el_errfile,
                    "term_move_to_line: where is ridiculous: %d\r\n", where);
#endif /* DEBUG_SCREEN */
                return;
        }
        if ((del = where - el->el_cursor.v) > 0) {
                while (del > 0) {
                        if (EL_HAS_AUTO_MARGINS &&
                            el->el_display[el->el_cursor.v][0] != '\0') {
                                /* move without newline */
                                term_move_to_char(el, el->el_term.t_size.h - 1);
                                term_overwrite(el,
                                    &el->el_display[el->el_cursor.v][el->el_cursor.h],
                                    1);
                                /* updates Cursor */
                                del--;
                        } else {
                                if ((del > 1) && GoodStr(T_DO)) {
                                        (void) tputs(tgoto(Str(T_DO), del, del),
                                            del, term__putc);
                                        del = 0;
                                } else {
                                        for (; del > 0; del--)
                                                term__putc('\n');
                                        /* because the \n will become \r\n */
                                        el->el_cursor.h = 0;
                                }
                        }
                }
        } else {                /* del < 0 */
                if (GoodStr(T_UP) && (-del > 1 || !GoodStr(T_up)))
                        (void) tputs(tgoto(Str(T_UP), -del, -del), -del,
                            term__putc);
                else {
                        if (GoodStr(T_up))
                                for (; del < 0; del++)
                                        (void) tputs(Str(T_up), 1, term__putc);
                }
        }
        el->el_cursor.v = where;/* now where is here */
}


/* term_move_to_char():
 *      Move to the character position specified
 */
protected void
term_move_to_char(EditLine *el, int where)
{
        int del, i;

mc_again:
        if (where == el->el_cursor.h)
                return;

        if (where > el->el_term.t_size.h) {
#ifdef DEBUG_SCREEN
                (void) fprintf(el->el_errfile,
                    "term_move_to_char: where is riduculous: %d\r\n", where);
#endif /* DEBUG_SCREEN */
                return;
        }
        if (!where) {           /* if where is first column */
                term__putc('\r');       /* do a CR */
                el->el_cursor.h = 0;
                return;
        }
        del = where - el->el_cursor.h;

        if ((del < -4 || del > 4) && GoodStr(T_ch))
                /* go there directly */
                (void) tputs(tgoto(Str(T_ch), where, where), where, term__putc);
        else {
                if (del > 0) {  /* moving forward */
                        if ((del > 4) && GoodStr(T_RI))
                                (void) tputs(tgoto(Str(T_RI), del, del),
                                    del, term__putc);
                        else {
                                        /* if I can do tabs, use them */
                                if (EL_CAN_TAB) {
                                        if ((el->el_cursor.h & 0370) !=
                                            (where & 0370)) {
                                                /* if not within tab stop */
                                                for (i =
                                                    (el->el_cursor.h & 0370);
                                                    i < (where & 0370);
                                                    i += 8)
                                                        term__putc('\t');       
                                                        /* then tab over */
                                                el->el_cursor.h = where & 0370;
                                        }
                                }
                                /*
                                 * it's usually cheaper to just write the
                                 * chars, so we do.
                                 */
                                /*
                                 * NOTE THAT term_overwrite() WILL CHANGE
                                 * el->el_cursor.h!!!
                                 */
                                term_overwrite(el,
                                    &el->el_display[el->el_cursor.v][el->el_cursor.h],
                                    where - el->el_cursor.h);

                        }
                } else {        /* del < 0 := moving backward */
                        if ((-del > 4) && GoodStr(T_LE))
                                (void) tputs(tgoto(Str(T_LE), -del, -del),
                                    -del, term__putc);
                        else {  /* can't go directly there */
                                /*
                                 * if the "cost" is greater than the "cost"
                                 * from col 0
                                 */
                                if (EL_CAN_TAB ?
                                    (-del > (((unsigned int) where >> 3) +
                                     (where & 07)))
                                    : (-del > where)) {
                                        term__putc('\r');       /* do a CR */
                                        el->el_cursor.h = 0;
                                        goto mc_again;  /* and try again */
                                }
                                for (i = 0; i < -del; i++)
                                        term__putc('\b');
                        }
                }
        }
        el->el_cursor.h = where;                /* now where is here */
}


/* term_overwrite():
 *      Overstrike num characters
 */
protected void
term_overwrite(EditLine *el, char *cp, int n)
{
        if (n <= 0)
                return;         /* catch bugs */

        if (n > el->el_term.t_size.h) {
#ifdef DEBUG_SCREEN
                (void) fprintf(el->el_errfile,
                    "term_overwrite: n is riduculous: %d\r\n", n);
#endif /* DEBUG_SCREEN */
                return;
        }
        do {
                term__putc(*cp++);
                el->el_cursor.h++;
        } while (--n);

        if (el->el_cursor.h >= el->el_term.t_size.h) {  /* wrap? */
                if (EL_HAS_AUTO_MARGINS) {      /* yes */
                        el->el_cursor.h = 0;
                        el->el_cursor.v++;
                        if (EL_HAS_MAGIC_MARGINS) {
                                /* force the wrap to avoid the "magic"
                                 * situation */
                                char c;
                                if ((c = el->el_display[el->el_cursor.v][el->el_cursor.h])
                                    != '\0')
                                        term_overwrite(el, &c, 1);
                                else
                                        term__putc(' ');
                                el->el_cursor.h = 1;
                        }
                } else          /* no wrap, but cursor stays on screen */
                        el->el_cursor.h = el->el_term.t_size.h;
        }
}


/* term_deletechars():
 *      Delete num characters
 */
protected void
term_deletechars(EditLine *el, int num)
{
        if (num <= 0)
                return;

        if (!EL_CAN_DELETE) {
#ifdef DEBUG_EDIT
                (void) fprintf(el->el_errfile, "   ERROR: cannot delete   \n");
#endif /* DEBUG_EDIT */
                return;
        }
        if (num > el->el_term.t_size.h) {
#ifdef DEBUG_SCREEN
                (void) fprintf(el->el_errfile,
                    "term_deletechars: num is riduculous: %d\r\n", num);
#endif /* DEBUG_SCREEN */
                return;
        }
        if (GoodStr(T_DC))      /* if I have multiple delete */
                if ((num > 1) || !GoodStr(T_dc)) {      /* if dc would be more
                                                         * expen. */
                        (void) tputs(tgoto(Str(T_DC), num, num),
                            num, term__putc);
                        return;
                }
        if (GoodStr(T_dm))      /* if I have delete mode */
                (void) tputs(Str(T_dm), 1, term__putc);

        if (GoodStr(T_dc))      /* else do one at a time */
                while (num--)
                        (void) tputs(Str(T_dc), 1, term__putc);

        if (GoodStr(T_ed))      /* if I have delete mode */
                (void) tputs(Str(T_ed), 1, term__putc);
}


/* term_insertwrite():
 *      Puts terminal in insert character mode or inserts num
 *      characters in the line
 */
protected void
term_insertwrite(EditLine *el, char *cp, int num)
{
        if (num <= 0)
                return;
        if (!EL_CAN_INSERT) {
#ifdef DEBUG_EDIT
                (void) fprintf(el->el_errfile, "   ERROR: cannot insert   \n");
#endif /* DEBUG_EDIT */
                return;
        }
        if (num > el->el_term.t_size.h) {
#ifdef DEBUG_SCREEN
                (void) fprintf(el->el_errfile,
                    "StartInsert: num is riduculous: %d\r\n", num);
#endif /* DEBUG_SCREEN */
                return;
        }
        if (GoodStr(T_IC))      /* if I have multiple insert */
                if ((num > 1) || !GoodStr(T_ic)) {
                                /* if ic would be more expensive */
                        (void) tputs(tgoto(Str(T_IC), num, num),
                            num, term__putc);
                        term_overwrite(el, cp, num);
                                /* this updates el_cursor.h */
                        return;
                }
        if (GoodStr(T_im) && GoodStr(T_ei)) {   /* if I have insert mode */
                (void) tputs(Str(T_im), 1, term__putc);

                el->el_cursor.h += num;
                do
                        term__putc(*cp++);
                while (--num);

                if (GoodStr(T_ip))      /* have to make num chars insert */
                        (void) tputs(Str(T_ip), 1, term__putc);

                (void) tputs(Str(T_ei), 1, term__putc);
                return;
        }
        do {
                if (GoodStr(T_ic))      /* have to make num chars insert */
                        (void) tputs(Str(T_ic), 1, term__putc);
                                        /* insert a char */

                term__putc(*cp++);

                el->el_cursor.h++;

                if (GoodStr(T_ip))      /* have to make num chars insert */
                        (void) tputs(Str(T_ip), 1, term__putc);
                                        /* pad the inserted char */

        } while (--num);
}


/* term_clear_EOL():
 *      clear to end of line.  There are num characters to clear
 */
protected void
term_clear_EOL(EditLine *el, int num)
{
        int i;

        if (EL_CAN_CEOL && GoodStr(T_ce))
                (void) tputs(Str(T_ce), 1, term__putc);
        else {
                for (i = 0; i < num; i++)
                        term__putc(' ');
                el->el_cursor.h += num; /* have written num spaces */
        }
}


/* term_clear_screen():
 *      Clear the screen
 */
protected void
term_clear_screen(EditLine *el)
{                               /* clear the whole screen and home */

        if (GoodStr(T_cl))
                /* send the clear screen code */
                (void) tputs(Str(T_cl), Val(T_li), term__putc);
        else if (GoodStr(T_ho) && GoodStr(T_cd)) {
                (void) tputs(Str(T_ho), Val(T_li), term__putc); /* home */
                /* clear to bottom of screen */
                (void) tputs(Str(T_cd), Val(T_li), term__putc);
        } else {
                term__putc('\r');
                term__putc('\n');
        }
}


/* term_beep():
 *      Beep the way the terminal wants us
 */
protected void
term_beep(EditLine *el)
{
        if (GoodStr(T_bl))
                /* what termcap says we should use */
                (void) tputs(Str(T_bl), 1, term__putc);
        else
                term__putc('\007');     /* an ASCII bell; ^G */
}


#ifdef notdef
/* term_clear_to_bottom():
 *      Clear to the bottom of the screen
 */
protected void
term_clear_to_bottom(EditLine *el)
{
        if (GoodStr(T_cd))
                (void) tputs(Str(T_cd), Val(T_li), term__putc);
        else if (GoodStr(T_ce))
                (void) tputs(Str(T_ce), Val(T_li), term__putc);
}
#endif


/* term_set():
 *      Read in the terminal capabilities from the requested terminal
 */
protected int
term_set(EditLine *el, char *term)
{
        int i;
        char buf[TC_BUFSIZE];
        char *area;
        const struct termcapstr *t;
        sigset_t oset, nset;
        int lins, cols;

        (void) sigemptyset(&nset);
        (void) sigaddset(&nset, SIGWINCH);
        (void) sigprocmask(SIG_BLOCK, &nset, &oset);

        area = buf;


        if (term == NULL)
                term = getenv("TERM");

        if (!term || !term[0])
                term = "dumb";

        if (strcmp(term, "emacs") == 0)
                el->el_flags |= EDIT_DISABLED;

        memset(el->el_term.t_cap, 0, TC_BUFSIZE);

        i = tgetent(el->el_term.t_cap, term);

        if (i <= 0) {
                if (i == -1)
                        (void) fprintf(el->el_errfile,
                            "Cannot read termcap database;\n");
                else if (i == 0)
                        (void) fprintf(el->el_errfile,
                            "No entry for terminal type \"%s\";\n", term);
                (void) fprintf(el->el_errfile,
                    "using dumb terminal settings.\n");
                Val(T_co) = 80; /* do a dumb terminal */
                Val(T_pt) = Val(T_km) = Val(T_li) = 0;
                Val(T_xt) = Val(T_MT);
                for (t = tstr; t->name != NULL; t++)
                        term_alloc(el, t, NULL);
        } else {
                /* auto/magic margins */
                Val(T_am) = tgetflag("am");
                Val(T_xn) = tgetflag("xn");
                /* Can we tab */
                Val(T_pt) = tgetflag("pt");
                Val(T_xt) = tgetflag("xt");
                /* do we have a meta? */
                Val(T_km) = tgetflag("km");
                Val(T_MT) = tgetflag("MT");
                /* Get the size */
                Val(T_co) = tgetnum("co");
                Val(T_li) = tgetnum("li");
                for (t = tstr; t->name != NULL; t++)
                        term_alloc(el, t, tgetstr(t->name, &area));
        }

        if (Val(T_co) < 2)
                Val(T_co) = 80; /* just in case */
        if (Val(T_li) < 1)
                Val(T_li) = 24;

        el->el_term.t_size.v = Val(T_co);
        el->el_term.t_size.h = Val(T_li);

        term_setflags(el);

                                /* get the correct window size */
        (void) term_get_size(el, &lins, &cols);
        if (term_change_size(el, lins, cols) == -1)
                return (-1);
        (void) sigprocmask(SIG_SETMASK, &oset, NULL);
        term_bind_arrow(el);
        return (i <= 0 ? -1 : 0);
}


/* term_get_size():
 *      Return the new window size in lines and cols, and
 *      true if the size was changed.
 */
protected int
term_get_size(EditLine *el, int *lins, int *cols)
{

        *cols = Val(T_co);
        *lins = Val(T_li);

#ifdef TIOCGWINSZ
        {
                struct winsize ws;
                if (ioctl(el->el_infd, TIOCGWINSZ, (ioctl_t) & ws) != -1) {
                        if (ws.ws_col)
                                *cols = ws.ws_col;
                        if (ws.ws_row)
                                *lins = ws.ws_row;
                }
        }
#endif
#ifdef TIOCGSIZE
        {
                struct ttysize ts;
                if (ioctl(el->el_infd, TIOCGSIZE, (ioctl_t) & ts) != -1) {
                        if (ts.ts_cols)
                                *cols = ts.ts_cols;
                        if (ts.ts_lines)
                                *lins = ts.ts_lines;
                }
        }
#endif
        return (Val(T_co) != *cols || Val(T_li) != *lins);
}


/* term_change_size():
 *      Change the size of the terminal
 */
protected int
term_change_size(EditLine *el, int lins, int cols)
{
        /*
         * Just in case
         */
        Val(T_co) = (cols < 2) ? 80 : cols;
        Val(T_li) = (lins < 1) ? 24 : lins;

        /* re-make display buffers */
        if (term_rebuffer_display(el) == -1)
                return (-1);
        re_clear_display(el);
        return (0);
}


/* term_init_arrow():
 *      Initialize the arrow key bindings from termcap
 */
private void
term_init_arrow(EditLine *el)
{
        fkey_t *arrow = el->el_term.t_fkey;

        arrow[A_K_DN].name = "down";
        arrow[A_K_DN].key = T_kd;
        arrow[A_K_DN].fun.cmd = ED_NEXT_HISTORY;
        arrow[A_K_DN].type = XK_CMD;

        arrow[A_K_UP].name = "up";
        arrow[A_K_UP].key = T_ku;
        arrow[A_K_UP].fun.cmd = ED_PREV_HISTORY;
        arrow[A_K_UP].type = XK_CMD;

        arrow[A_K_LT].name = "left";
        arrow[A_K_LT].key = T_kl;
        arrow[A_K_LT].fun.cmd = ED_PREV_CHAR;
        arrow[A_K_LT].type = XK_CMD;

        arrow[A_K_RT].name = "right";
        arrow[A_K_RT].key = T_kr;
        arrow[A_K_RT].fun.cmd = ED_NEXT_CHAR;
        arrow[A_K_RT].type = XK_CMD;

        arrow[A_K_HO].name = "home";
        arrow[A_K_HO].key = T_kh;
        arrow[A_K_HO].fun.cmd = ED_MOVE_TO_BEG;
        arrow[A_K_HO].type = XK_CMD;

        arrow[A_K_EN].name = "end";
        arrow[A_K_EN].key = T_at7;
        arrow[A_K_EN].fun.cmd = ED_MOVE_TO_END;
        arrow[A_K_EN].type = XK_CMD;
}


/* term_reset_arrow():
 *      Reset arrow key bindings
 */
private void
term_reset_arrow(EditLine *el)
{
        fkey_t *arrow = el->el_term.t_fkey;
        static const char strA[] = {033, '[', 'A', '\0'};
        static const char strB[] = {033, '[', 'B', '\0'};
        static const char strC[] = {033, '[', 'C', '\0'};
        static const char strD[] = {033, '[', 'D', '\0'};
        static const char strH[] = {033, '[', 'H', '\0'};
        static const char strF[] = {033, '[', 'F', '\0'};
        static const char stOA[] = {033, 'O', 'A', '\0'};
        static const char stOB[] = {033, 'O', 'B', '\0'};
        static const char stOC[] = {033, 'O', 'C', '\0'};
        static const char stOD[] = {033, 'O', 'D', '\0'};
        static const char stOH[] = {033, 'O', 'H', '\0'};
        static const char stOF[] = {033, 'O', 'F', '\0'};

        key_add(el, strA, &arrow[A_K_UP].fun, arrow[A_K_UP].type);
        key_add(el, strB, &arrow[A_K_DN].fun, arrow[A_K_DN].type);
        key_add(el, strC, &arrow[A_K_RT].fun, arrow[A_K_RT].type);
        key_add(el, strD, &arrow[A_K_LT].fun, arrow[A_K_LT].type);
        key_add(el, strH, &arrow[A_K_HO].fun, arrow[A_K_HO].type);
        key_add(el, strF, &arrow[A_K_EN].fun, arrow[A_K_EN].type);
        key_add(el, stOA, &arrow[A_K_UP].fun, arrow[A_K_UP].type);
        key_add(el, stOB, &arrow[A_K_DN].fun, arrow[A_K_DN].type);
        key_add(el, stOC, &arrow[A_K_RT].fun, arrow[A_K_RT].type);
        key_add(el, stOD, &arrow[A_K_LT].fun, arrow[A_K_LT].type);
        key_add(el, stOH, &arrow[A_K_HO].fun, arrow[A_K_HO].type);
        key_add(el, stOF, &arrow[A_K_EN].fun, arrow[A_K_EN].type);

        if (el->el_map.type == MAP_VI) {
                key_add(el, &strA[1], &arrow[A_K_UP].fun, arrow[A_K_UP].type);
                key_add(el, &strB[1], &arrow[A_K_DN].fun, arrow[A_K_DN].type);
                key_add(el, &strC[1], &arrow[A_K_RT].fun, arrow[A_K_RT].type);
                key_add(el, &strD[1], &arrow[A_K_LT].fun, arrow[A_K_LT].type);
                key_add(el, &strH[1], &arrow[A_K_HO].fun, arrow[A_K_HO].type);
                key_add(el, &strF[1], &arrow[A_K_EN].fun, arrow[A_K_EN].type);
                key_add(el, &stOA[1], &arrow[A_K_UP].fun, arrow[A_K_UP].type);
                key_add(el, &stOB[1], &arrow[A_K_DN].fun, arrow[A_K_DN].type);
                key_add(el, &stOC[1], &arrow[A_K_RT].fun, arrow[A_K_RT].type);
                key_add(el, &stOD[1], &arrow[A_K_LT].fun, arrow[A_K_LT].type);
                key_add(el, &stOH[1], &arrow[A_K_HO].fun, arrow[A_K_HO].type);
                key_add(el, &stOF[1], &arrow[A_K_EN].fun, arrow[A_K_EN].type);
        }
}


/* term_set_arrow():
 *      Set an arrow key binding
 */
protected int
term_set_arrow(EditLine *el, char *name, key_value_t *fun, int type)
{
        fkey_t *arrow = el->el_term.t_fkey;
        int i;

        for (i = 0; i < A_K_NKEYS; i++)
                if (strcmp(name, arrow[i].name) == 0) {
                        arrow[i].fun = *fun;
                        arrow[i].type = type;
                        return (0);
                }
        return (-1);
}


/* term_clear_arrow():
 *      Clear an arrow key binding
 */
protected int
term_clear_arrow(EditLine *el, char *name)
{
        fkey_t *arrow = el->el_term.t_fkey;
        int i;

        for (i = 0; i < A_K_NKEYS; i++)
                if (strcmp(name, arrow[i].name) == 0) {
                        arrow[i].type = XK_NOD;
                        return (0);
                }
        return (-1);
}


/* term_print_arrow():
 *      Print the arrow key bindings
 */
protected void
term_print_arrow(EditLine *el, char *name)
{
        int i;
        fkey_t *arrow = el->el_term.t_fkey;

        for (i = 0; i < A_K_NKEYS; i++)
                if (*name == '\0' || strcmp(name, arrow[i].name) == 0)
                        if (arrow[i].type != XK_NOD)
                                key_kprint(el, arrow[i].name, &arrow[i].fun,
                                    arrow[i].type);
}


/* term_bind_arrow():
 *      Bind the arrow keys
 */
protected void
term_bind_arrow(EditLine *el)
{
        el_action_t *map;
        const el_action_t *dmap;
        int i, j;
        char *p;
        fkey_t *arrow = el->el_term.t_fkey;

        /* Check if the components needed are initialized */
        if (el->el_term.t_buf == NULL || el->el_map.key == NULL)
                return;

        map = el->el_map.type == MAP_VI ? el->el_map.alt : el->el_map.key;
        dmap = el->el_map.type == MAP_VI ? el->el_map.vic : el->el_map.emacs;

        term_reset_arrow(el);

        for (i = 0; i < A_K_NKEYS; i++) {
                p = el->el_term.t_str[arrow[i].key];
                if (p && *p) {
                        j = (unsigned char) *p;
                        /*
                         * Assign the arrow keys only if:
                         *
                         * 1. They are multi-character arrow keys and the user
                         *    has not re-assigned the leading character, or
                         *    has re-assigned the leading character to be
                         *        ED_SEQUENCE_LEAD_IN
                         * 2. They are single arrow keys pointing to an
                         *    unassigned key.
                         */
                        if (arrow[i].type == XK_NOD)
                                key_clear(el, map, p);
                        else {
                                if (p[1] && (dmap[j] == map[j] ||
                                        map[j] == ED_SEQUENCE_LEAD_IN)) {
                                        key_add(el, p, &arrow[i].fun,
                                            arrow[i].type);
                                        map[j] = ED_SEQUENCE_LEAD_IN;
                                } else if (map[j] == ED_UNASSIGNED) {
                                        key_clear(el, map, p);
                                        if (arrow[i].type == XK_CMD)
                                                map[j] = arrow[i].fun.cmd;
                                        else
                                                key_add(el, p, &arrow[i].fun,
                                                    arrow[i].type);
                                }
                        }
                }
        }
}


/* term__putc():
 *      Add a character
 */
protected int
term__putc(int c)
{

        return (fputc(c, term_outfile));
}


/* term__flush():
 *      Flush output
 */
protected void
term__flush(void)
{

        (void) fflush(term_outfile);
}


/* term_telltc():
 *      Print the current termcap characteristics
 */
protected int
/*ARGSUSED*/
term_telltc(EditLine *el, int argc, char **argv)
{
        const struct termcapstr *t;
        char **ts;
        char upbuf[EL_BUFSIZ];

        (void) fprintf(el->el_outfile, "\n\tYour terminal has the\n");
        (void) fprintf(el->el_outfile, "\tfollowing characteristics:\n\n");
        (void) fprintf(el->el_outfile, "\tIt has %d columns and %d lines\n",
            Val(T_co), Val(T_li));
        (void) fprintf(el->el_outfile,
            "\tIt has %s meta key\n", EL_HAS_META ? "a" : "no");
        (void) fprintf(el->el_outfile,
            "\tIt can%suse tabs\n", EL_CAN_TAB ? " " : "not ");
        (void) fprintf(el->el_outfile, "\tIt %s automatic margins\n",
            EL_HAS_AUTO_MARGINS ? "has" : "does not have");
        if (EL_HAS_AUTO_MARGINS)
                (void) fprintf(el->el_outfile, "\tIt %s magic margins\n",
                    EL_HAS_MAGIC_MARGINS ? "has" : "does not have");

        for (t = tstr, ts = el->el_term.t_str; t->name != NULL; t++, ts++)
                (void) fprintf(el->el_outfile, "\t%25s (%s) == %s\n",
                    t->long_name,
                    t->name, *ts && **ts ?
                    key__decode_str(*ts, upbuf, "") : "(empty)");
        (void) fputc('\n', el->el_outfile);
        return (0);
}


/* term_settc():
 *      Change the current terminal characteristics
 */
protected int
/*ARGSUSED*/
term_settc(EditLine *el, int argc, char **argv)
{
        const struct termcapstr *ts;
        const struct termcapval *tv;
        char *what, *how;

        if (argv == NULL || argv[1] == NULL || argv[2] == NULL)
                return (-1);

        what = argv[1];
        how = argv[2];

        /*
         * Do the strings first
         */
        for (ts = tstr; ts->name != NULL; ts++)
                if (strcmp(ts->name, what) == 0)
                        break;

        if (ts->name != NULL) {
                term_alloc(el, ts, how);
                term_setflags(el);
                return (0);
        }
        /*
         * Do the numeric ones second
         */
        for (tv = tval; tv->name != NULL; tv++)
                if (strcmp(tv->name, what) == 0)
                        break;

        if (tv->name != NULL) {
                if (tv == &tval[T_pt] || tv == &tval[T_km] ||
                    tv == &tval[T_am] || tv == &tval[T_xn]) {
                        if (strcmp(how, "yes") == 0)
                                el->el_term.t_val[tv - tval] = 1;
                        else if (strcmp(how, "no") == 0)
                                el->el_term.t_val[tv - tval] = 0;
                        else {
                                (void) fprintf(el->el_errfile,
                                    "settc: Bad value `%s'.\n", how);
                                return (-1);
                        }
                        term_setflags(el);
                        if (term_change_size(el, Val(T_li), Val(T_co)) == -1)
                                return (-1);
                        return (0);
                } else {
                        long i;
                        char *ep;

                        i = strtol(how, &ep, 10);
                        if (*ep != '\0') {
                                (void) fprintf(el->el_errfile,
                                    "settc: Bad value `%s'.\n", how);
                                return (-1);
                        }
                        el->el_term.t_val[tv - tval] = (int) i;
                        el->el_term.t_size.v = Val(T_co);
                        el->el_term.t_size.h = Val(T_li);
                        if (tv == &tval[T_co] || tv == &tval[T_li])
                                if (term_change_size(el, Val(T_li), Val(T_co))
                                    == -1)
                                        return (-1);
                        return (0);
                }
        }
        return (-1);
}


/* term_echotc():
 *      Print the termcap string out with variable substitution
 */
protected int
/*ARGSUSED*/
term_echotc(EditLine *el, int argc, char **argv)
{
        char *cap, *scap, *ep;
        int arg_need, arg_cols, arg_rows;
        int verbose = 0, silent = 0;
        char *area;
        static const char fmts[] = "%s\n", fmtd[] = "%d\n";
        const struct termcapstr *t;
        char buf[TC_BUFSIZE];
        long i;

        area = buf;

        if (argv == NULL || argv[1] == NULL)
                return (-1);
        argv++;

        if (argv[0][0] == '-') {
                switch (argv[0][1]) {
                case 'v':
                        verbose = 1;
                        break;
                case 's':
                        silent = 1;
                        break;
                default:
                        /* stderror(ERR_NAME | ERR_TCUSAGE); */
                        break;
                }
                argv++;
        }
        if (!*argv || *argv[0] == '\0')
                return (0);
        if (strcmp(*argv, "tabs") == 0) {
                (void) fprintf(el->el_outfile, fmts, EL_CAN_TAB ? "yes" : "no");
                return (0);
        } else if (strcmp(*argv, "meta") == 0) {
                (void) fprintf(el->el_outfile, fmts, Val(T_km) ? "yes" : "no");
                return (0);
        } else if (strcmp(*argv, "xn") == 0) {
                (void) fprintf(el->el_outfile, fmts, EL_HAS_MAGIC_MARGINS ?
                    "yes" : "no");
                return (0);
        } else if (strcmp(*argv, "am") == 0) {
                (void) fprintf(el->el_outfile, fmts, EL_HAS_AUTO_MARGINS ?
                    "yes" : "no");
                return (0);
        } else if (strcmp(*argv, "baud") == 0) {
#ifdef notdef
                int i;

                for (i = 0; baud_rate[i].b_name != NULL; i++)
                        if (el->el_tty.t_speed == baud_rate[i].b_rate) {
                                (void) fprintf(el->el_outfile, fmts,
                                    baud_rate[i].b_name);
                                return (0);
                        }
                (void) fprintf(el->el_outfile, fmtd, 0);
#else
                (void) fprintf(el->el_outfile, fmtd, el->el_tty.t_speed);
#endif
                return (0);
        } else if (strcmp(*argv, "rows") == 0 || strcmp(*argv, "lines") == 0) {
                (void) fprintf(el->el_outfile, fmtd, Val(T_li));
                return (0);
        } else if (strcmp(*argv, "cols") == 0) {
                (void) fprintf(el->el_outfile, fmtd, Val(T_co));
                return (0);
        }
        /*
         * Try to use our local definition first
         */
        scap = NULL;
        for (t = tstr; t->name != NULL; t++)
                if (strcmp(t->name, *argv) == 0) {
                        scap = el->el_term.t_str[t - tstr];
                        break;
                }
        if (t->name == NULL)
                scap = tgetstr(*argv, &area);
        if (!scap || scap[0] == '\0') {
                if (!silent)
                        (void) fprintf(el->el_errfile,
                            "echotc: Termcap parameter `%s' not found.\n",
                            *argv);
                return (-1);
        }
        /*
         * Count home many values we need for this capability.
         */
        for (cap = scap, arg_need = 0; *cap; cap++)
                if (*cap == '%')
                        switch (*++cap) {
                        case 'd':
                        case '2':
                        case '3':
                        case '.':
                        case '+':
                                arg_need++;
                                break;
                        case '%':
                        case '>':
                        case 'i':
                        case 'r':
                        case 'n':
                        case 'B':
                        case 'D':
                                break;
                        default:
                                /*
                                 * hpux has lot's of them...
                                 */
                                if (verbose)
                                        (void) fprintf(el->el_errfile,
                                "echotc: Warning: unknown termcap %% `%c'.\n",
                                            *cap);
                                /* This is bad, but I won't complain */
                                break;
                        }

        switch (arg_need) {
        case 0:
                argv++;
                if (*argv && *argv[0]) {
                        if (!silent)
                                (void) fprintf(el->el_errfile,
                                    "echotc: Warning: Extra argument `%s'.\n",
                                    *argv);
                        return (-1);
                }
                (void) tputs(scap, 1, term__putc);
                break;
        case 1:
                argv++;
                if (!*argv || *argv[0] == '\0') {
                        if (!silent)
                                (void) fprintf(el->el_errfile,
                                    "echotc: Warning: Missing argument.\n");
                        return (-1);
                }
                arg_cols = 0;
                i = strtol(*argv, &ep, 10);
                if (*ep != '\0' || i < 0) {
                        if (!silent)
                                (void) fprintf(el->el_errfile,
                                    "echotc: Bad value `%s' for rows.\n",
                                    *argv);
                        return (-1);
                }
                arg_rows = (int) i;
                argv++;
                if (*argv && *argv[0]) {
                        if (!silent)
                                (void) fprintf(el->el_errfile,
                                    "echotc: Warning: Extra argument `%s'.\n",
                                    *argv);
                        return (-1);
                }
                (void) tputs(tgoto(scap, arg_cols, arg_rows), 1, term__putc);
                break;
        default:
                /* This is wrong, but I will ignore it... */
                if (verbose)
                        (void) fprintf(el->el_errfile,
                         "echotc: Warning: Too many required arguments (%d).\n",
                            arg_need);
                /* FALLTHROUGH */
        case 2:
                argv++;
                if (!*argv || *argv[0] == '\0') {
                        if (!silent)
                                (void) fprintf(el->el_errfile,
                                    "echotc: Warning: Missing argument.\n");
                        return (-1);
                }
                i = strtol(*argv, &ep, 10);
                if (*ep != '\0' || i < 0) {
                        if (!silent)
                                (void) fprintf(el->el_errfile,
                                    "echotc: Bad value `%s' for cols.\n",
                                    *argv);
                        return (-1);
                }
                arg_cols = (int) i;
                argv++;
                if (!*argv || *argv[0] == '\0') {
                        if (!silent)
                                (void) fprintf(el->el_errfile,
                                    "echotc: Warning: Missing argument.\n");
                        return (-1);
                }
                i = strtol(*argv, &ep, 10);
                if (*ep != '\0' || i < 0) {
                        if (!silent)
                                (void) fprintf(el->el_errfile,
                                    "echotc: Bad value `%s' for rows.\n",
                                    *argv);
                        return (-1);
                }
                arg_rows = (int) i;
                if (*ep != '\0') {
                        if (!silent)
                                (void) fprintf(el->el_errfile,
                                    "echotc: Bad value `%s'.\n", *argv);
                        return (-1);
                }
                argv++;
                if (*argv && *argv[0]) {
                        if (!silent)
                                (void) fprintf(el->el_errfile,
                                    "echotc: Warning: Extra argument `%s'.\n",
                                    *argv);
                        return (-1);
                }
                (void) tputs(tgoto(scap, arg_cols, arg_rows), arg_rows,
                    term__putc);
                break;
        }
        return (0);
}
